Toothbrush



FIG. 1 is a perspective view of a toothbrush showing my new design;

FIG. 2 is a rear view of the toothbrush;

FIG. 3 is a left side view of the toothbrush;

FIG. 4 is a front view of the toothbrush;

FIG. 5 is a top view of the toothbrush; and,

FIG. 6 is a bottom view of the toothbrush.

The broken lines in the FIGURES show the bristles and are for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for a toothbrush, as shown and described. 